MapSource makes it easy to enhance the basemap of your compatible GPS unit. WorldMap provides basic worldwide map detail that includes political boundaries, cities, towns, major motorways, railroads, highways, lakes, rivers and coastline detail. You can also use MapSource to create routes and waypoints on your PC and transfer them to your GPS. Please note: The trip and waypoint management functions of this product work with nearly all GARMIN GPS units, excluding the GPS100 family and panel mount aviation units. The map download feature of this product are is compatible with the GPS III Plus, NavTalk, GPS 12MAP, eTrex Legend, eTrex Vista, GPS V, GPSMAP 76, GPSMAP 176, GPSMAP 196, Rino 120, GPSMAP 162/168, StreetPilot GPS, StreetPilot ColorMap, GPSMAP 295, and eMap. Some units may require a GARMIN data card to upload map data.